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Detailed explanation-1: -Till now, the oldest known multicellular plant fossils were discovered in the Canadian Arctic and consisted of red algae. The shape and structure of fossil remains reveal that they belong to red algae, which are known for their unique biodiversity.

Detailed explanation-2: -WASHINGTON (Reuters)-Scientists have spotted in rocks from northern China what may be the oldest fossils of a green plant ever found, tiny seaweed that carpeted areas of the seafloor roughly a billion years ago and were part of a primordial revolution among life on Earth.

Detailed explanation-3: -“Put simply, these 1.6 billion year-old fossils of red algae are forcing us to reconsider the timing of when advanced multicellular life arose on Earth. They tell us that it happened much earlier than previously thought, ” says Sallstedt.

Detailed explanation-4: -Plant fossils are commonly preserved in fluvial or deltaic systems where rivers deposit sediment. Many of the best leaves are preserved in abandoned river channels that form oxbow lakes.

Detailed explanation-5: -Fossil evidence of plants begins around 3000 Ma with indirect evidence of oxygen-producing photosynthesis in the geological record, in the form of chemical and isotopic signatures in rocks and fossil evidence of colonies of cyanobacteria, photosynthesizing prokaryotic organisms.